Add a script to delete labels with no threads

Author: mattst88

gmail-delete-empty-labels.gs

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+const labelPrefixes = ["freedesktop"];
+
+function deleteEmptyLabels() {
+  let userLabels = GmailApp.getUserLabels();
+
+  for (const label of userLabels) {
+    for (const prefix of labelPrefixes) {
+      if (label.getName().startsWith(prefix + '/')) {
+        var threads = label.getThreads(0, 1);
+        if (threads.length == 0) {
+          Logger.log(label.getName() + " is empty");
+          label.deleteLabel();
+        }
+      }
+    }
+  }
+}